Integration of electrodialysis and Donnan dialysis for the selective separation of ammonium from high-salinity wastewater

Ding, Rui; Ding, Ziyi; Chen, Xiongjian; Fu, Jianling; Zhou, Zijing; Chen, Xiao; Zheng, Xuejun; Jin, Yanchao; Chen, Riyao

doi:10.1016/j.cej.2020.127001

Cited by 15 publications

(2 citation statements)

References 31 publications

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“…Therefore, ions migrate from the relatively highly concentrated parts of the concentrate compartments to the dilute compartment and increase the diffusion of the electrolyte. 28 Similar to the concentration variations, the rate of volume change in the dilute compartment is nearly inversely proportional to the applied current density, as shown in Fig. 2b.…”

Section: Resultsmentioning

confidence: 63%

Electrodialysis of a Lithium Sulphate Solution: An Experimental Investigation

Kang¹,

Kang²,

Jung³

et al. 2022

J. Electrochem. Soc.

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In the hydrometallurgical recycling of spent lithium-ion batteries, a lithium sulphate solution (Li2SO4) can be obtained as a by-product. Electrodialysis (ED) was employed in this study to split Li2SO4 into lithium hydroxide (LiOH) and sulfuric acid (H2SO4) solutions, which can be reused in the recycling process to create a closed-loop process. A three-compartment ED cell with a dilute channel filled with a Li2SO4 solution and two concentrate channels separately filled with LiOH and H2SO4 solutions was developed. The dilute and concentrate channels were separated by cation-exchange and anion-exchange membranes, respectively. High ion recovery ratios of Li+ and SO42- of 94.3 and 87.5%, respectively, were achieved at a current density of 833 A·m-2. The effects of the current density, inlet concentrations, and initial fluid volume on the overall efficiency of the cell were studied. Electro-osmosis played an important role during ED, particularly on the functioning of the cation-exchange membrane. Increasing the initial solution volume in the concentrated compartments can enhance current efficiency and ion recovery. In conclusion, the present study provides insights into the transport of coupled species through an ED cell, and the findings may guide future designs and operations of ED cells for optimal efficiency.

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Section: Resultsmentioning

confidence: 63%

Electrodialysis of a Lithium Sulphate Solution: An Experimental Investigation

Kang¹,

Kang²,

Jung³

et al. 2022

J. Electrochem. Soc.

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“…The integration of conventional ED and Donnan dialysis (DD) [ 187 ] removed up to 89.1% of NH 4 + from simulated high-salinity wastewater. The percentage of ammonium cations recovered was 13.3% and 32.3% higher than that achieved using single modules of conventional ED and DD, respectively.…”

Section: Modern Trends In Nutrients Recoverymentioning

confidence: 99%

Recovery of Nutrients from Residual Streams Using Ion-Exchange Membranes: Current State, Bottlenecks, Fundamentals and Innovations

2022

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The review describes the place of membrane methods in solving the problem of the recovery and re-use of biogenic elements (nutrients), primarily trivalent nitrogen NIII and pentavalent phosphorus PV, to provide the sustainable development of mankind. Methods for the recovery of NH4+ − NH3 and phosphates from natural sources and waste products of humans and animals, as well as industrial streams, are classified. Particular attention is paid to the possibilities of using membrane processes for the transition to a circular economy in the field of nutrients. The possibilities of different methods, already developed or under development, are evaluated, primarily those that use ion-exchange membranes. Electromembrane methods take a special place including capacitive deionization and electrodialysis applied for recovery, separation, concentration, and reagent-free pH shift of solutions. This review is distinguished by the fact that it summarizes not only the successes, but also the “bottlenecks” of ion-exchange membrane-based processes. Modern views on the mechanisms of NH4+ − NH3 and phosphate transport in ion-exchange membranes in the presence and in the absence of an electric field are discussed. The innovations to enhance the performance of electromembrane separation processes for phosphate and ammonium recovery are considered.

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